Monday, April 11.

PRESIDENT AND FELLOWS OF HARVARD COLLEGE. Meeting at No. 50 State St., Boston, 10.30 A. M.

**PHYSICAL COLLOQUIUM. Luminescence of Minerals. Relations among the Spectra of the Elements. Dr. Morse and Dr. Lyman. Jefferson Physical Laboratory, Room 25, 4.45 P. M.

SEMINARY OF ECONOMICS. Progress in Manufactures in the United States. Hon. S. N. D. North, Director United States Census Bureau. University 23, 7.30 P. M.

*ENGINEERING SOCIETY. The Baltimore Fire. Mr. Frank B. Gilbreth. Lecture Room, Pierce Hall, 8 P. M.

*LECTURES ON GREECE. V. Greek and its Natural History. (Illustrated by the Stereopticon). Dr. Hans Gadow, F. R. S., of Cambridge University, Eng-Literary Criticism. Dr. S. H. Butcher. Lecture Room of the Fogg Museum, 8 P. M.